Does anyone know if a mid 2011 mac is upgradeable? Right now I have a 1 GB Apple 661-5969 AMD Radeon HD 6970M, Card, Video - Mid 2011 graphics card and 4 gigs of ram. I also have a 2.5 GHz Intel Core i5 processor and im kind of new to tech, but does changing the graphics mean i have to get a new processor too? (If it does can someone link me a better video card that I can install)